vcpkg/ports/vsg/devendor-glslang.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6e7ec437..db4d30f1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,9 +37,11 @@ find_package(Vulkan ${Vulkan_MIN_VERSION} REQUIRED)
 
 find_package(Threads REQUIRED)
 
+find_package(glslang CONFIG REQUIRED)
+
 # Enable/disable shader compilation support that pulls in glslang
 set(VSG_SUPPORTS_ShaderCompiler  1 CACHE STRING "Optional shader compiler support, 0 for off, 1 for enabled." )
-if (VSG_SUPPORTS_ShaderCompiler)
+if (FALSE)
     if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/src/glslang/build_vars.cmake)
 
         if (Git_FOUND)
diff --git a/src/vsg/CMakeLists.txt b/src/vsg/CMakeLists.txt
index 3d9625e4..96285e99 100644
--- a/src/vsg/CMakeLists.txt
+++ b/src/vsg/CMakeLists.txt
@@ -227,14 +227,24 @@ set(SOURCES
     utils/LoadPagedLOD.cpp
 )
 
-if (${VSG_SUPPORTS_ShaderCompiler})
+if (FALSE)
 
     # include glslang source code directly into the VulkanScenegraph library build.
     include(../glslang/build_vars.cmake)
 endif()
 
 # set up library dependencies
-set(LIBRARIES PUBLIC
+set(LIBRARIES
+	PRIVATE
+        glslang::glslang
+        glslang::OSDependent
+        glslang::MachineIndependent
+        glslang::GenericCodeGen
+        glslang::glslang-default-resource-limits
+        glslang::OGLCompiler
+        glslang::SPVRemapper
+        glslang::SPIRV
+	PUBLIC
         Vulkan::Vulkan
         Threads::Threads
 )
@@ -365,9 +375,6 @@ target_include_directories(vsg
     PUBLIC
         $<BUILD_INTERFACE:${VSG_SOURCE_DIR}/include>
         $<BUILD_INTERFACE:${VSG_BINARY_DIR}/include>
-    PRIVATE
-        $<BUILD_INTERFACE:${VSG_SOURCE_DIR}/src/glslang>
-        $<BUILD_INTERFACE:${GLSLANG_GENERATED_INCLUDEDIR}>
 )
 
 target_link_libraries(vsg ${LIBRARIES})
diff --git a/src/vsg/utils/ShaderCompiler.cpp b/src/vsg/utils/ShaderCompiler.cpp
index 71a7f09f..803f26a1 100644
--- a/src/vsg/utils/ShaderCompiler.cpp
+++ b/src/vsg/utils/ShaderCompiler.cpp
@@ -20,7 +20,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 #include <vsg/utils/ShaderCompiler.h>
 
 #if VSG_SUPPORTS_ShaderCompiler
-#    include <SPIRV/GlslangToSpv.h>
+#    include <glslang/SPIRV/GlslangToSpv.h>
 #    include <glslang/Public/ResourceLimits.h>
 #    include <glslang/Public/ShaderLang.h>
 #endif
diff --git a/src/vsg/vsgConfig.cmake.in b/src/vsg/vsgConfig.cmake.in
index 7ea0de02..4f7e77bd 100644
--- a/src/vsg/vsgConfig.cmake.in
+++ b/src/vsg/vsgConfig.cmake.in
@@ -2,6 +2,7 @@ include(CMakeFindDependencyMacro)
 
 find_package(Vulkan @Vulkan_MIN_VERSION@ REQUIRED)
 find_dependency(Threads)
+find_dependency(glslang)
 
 @FIND_DEPENDENCY_WINDOWING@
 include("${CMAKE_CURRENT_LIST_DIR}/vsgTargets.cmake")